./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/egcd-ll_unwindbound20.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a548448c-8919-48b0-8612-a517d9507910/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a548448c-8919-48b0-8612-a517d9507910/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a548448c-8919-48b0-8612-a517d9507910/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a548448c-8919-48b0-8612-a517d9507910/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/egcd-ll_unwindbound20.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a548448c-8919-48b0-8612-a517d9507910/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a548448c-8919-48b0-8612-a517d9507910/bin/utaipan-ByfvJB40ur --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4aef2940f6d326843487f003443fc222e2136d386047f492f8bd5c7e21afc8f5 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-26 00:17:25,521 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-26 00:17:25,526 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-26 00:17:25,562 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-26 00:17:25,565 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-26 00:17:25,568 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-26 00:17:25,571 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-26 00:17:25,574 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-26 00:17:25,576 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-26 00:17:25,582 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-26 00:17:25,584 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-26 00:17:25,586 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-26 00:17:25,587 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-26 00:17:25,591 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-26 00:17:25,593 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-26 00:17:25,596 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-26 00:17:25,598 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-26 00:17:25,599 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-26 00:17:25,600 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-26 00:17:25,607 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-26 00:17:25,609 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-26 00:17:25,611 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-26 00:17:25,613 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-26 00:17:25,613 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-26 00:17:25,622 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-26 00:17:25,625 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-26 00:17:25,625 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-26 00:17:25,626 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-26 00:17:25,628 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-26 00:17:25,630 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-26 00:17:25,630 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-26 00:17:25,631 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-26 00:17:25,633 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-26 00:17:25,634 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-26 00:17:25,636 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-26 00:17:25,637 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-26 00:17:25,638 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-26 00:17:25,638 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-26 00:17:25,638 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-26 00:17:25,639 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-26 00:17:25,640 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-26 00:17:25,641 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a548448c-8919-48b0-8612-a517d9507910/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-26 00:17:25,678 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-26 00:17:25,678 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-26 00:17:25,679 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-26 00:17:25,679 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-26 00:17:25,680 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-26 00:17:25,680 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-26 00:17:25,681 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-26 00:17:25,681 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-26 00:17:25,681 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-26 00:17:25,681 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-26 00:17:25,682 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-26 00:17:25,683 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-26 00:17:25,683 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-26 00:17:25,683 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-26 00:17:25,683 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-26 00:17:25,683 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-26 00:17:25,684 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-26 00:17:25,684 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-26 00:17:25,685 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-26 00:17:25,685 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-26 00:17:25,685 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-26 00:17:25,685 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-26 00:17:25,685 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-26 00:17:25,686 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-26 00:17:25,686 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-26 00:17:25,686 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-26 00:17:25,686 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-26 00:17:25,686 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-26 00:17:25,687 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-26 00:17:25,687 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-26 00:17:25,687 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-26 00:17:25,688 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-26 00:17:25,688 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:17:25,688 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-26 00:17:25,688 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-26 00:17:25,688 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-26 00:17:25,689 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-26 00:17:25,689 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-26 00:17:25,689 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-26 00:17:25,689 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-26 00:17:25,689 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-26 00:17:25,690 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a548448c-8919-48b0-8612-a517d9507910/bin/utaipan-ByfvJB40ur/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a548448c-8919-48b0-8612-a517d9507910/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4aef2940f6d326843487f003443fc222e2136d386047f492f8bd5c7e21afc8f5 [2022-11-26 00:17:25,985 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-26 00:17:26,020 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-26 00:17:26,023 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-26 00:17:26,024 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-26 00:17:26,025 INFO L275 PluginConnector]: CDTParser initialized [2022-11-26 00:17:26,026 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a548448c-8919-48b0-8612-a517d9507910/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/nla-digbench-scaling/egcd-ll_unwindbound20.c [2022-11-26 00:17:29,193 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-26 00:17:29,492 INFO L351 CDTParser]: Found 1 translation units. [2022-11-26 00:17:29,493 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a548448c-8919-48b0-8612-a517d9507910/sv-benchmarks/c/nla-digbench-scaling/egcd-ll_unwindbound20.c [2022-11-26 00:17:29,500 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a548448c-8919-48b0-8612-a517d9507910/bin/utaipan-ByfvJB40ur/data/9fba5c9aa/c8989c67a82d495ca8a0d7684105ec0e/FLAG61c9d2fb0 [2022-11-26 00:17:29,515 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a548448c-8919-48b0-8612-a517d9507910/bin/utaipan-ByfvJB40ur/data/9fba5c9aa/c8989c67a82d495ca8a0d7684105ec0e [2022-11-26 00:17:29,519 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-26 00:17:29,521 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-26 00:17:29,523 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-26 00:17:29,523 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-26 00:17:29,527 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-26 00:17:29,528 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:17:29" (1/1) ... [2022-11-26 00:17:29,529 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@759a84dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:17:29, skipping insertion in model container [2022-11-26 00:17:29,529 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:17:29" (1/1) ... [2022-11-26 00:17:29,537 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-26 00:17:29,552 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-26 00:17:29,701 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a548448c-8919-48b0-8612-a517d9507910/sv-benchmarks/c/nla-digbench-scaling/egcd-ll_unwindbound20.c[489,502] [2022-11-26 00:17:29,719 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:17:29,728 INFO L203 MainTranslator]: Completed pre-run [2022-11-26 00:17:29,740 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a548448c-8919-48b0-8612-a517d9507910/sv-benchmarks/c/nla-digbench-scaling/egcd-ll_unwindbound20.c[489,502] [2022-11-26 00:17:29,747 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:17:29,760 INFO L208 MainTranslator]: Completed translation [2022-11-26 00:17:29,760 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:17:29 WrapperNode [2022-11-26 00:17:29,761 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-26 00:17:29,762 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-26 00:17:29,762 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-26 00:17:29,762 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-26 00:17:29,769 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:17:29" (1/1) ... [2022-11-26 00:17:29,776 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:17:29" (1/1) ... [2022-11-26 00:17:29,800 INFO L138 Inliner]: procedures = 14, calls = 16, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 59 [2022-11-26 00:17:29,801 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-26 00:17:29,802 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-26 00:17:29,802 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-26 00:17:29,802 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-26 00:17:29,812 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:17:29" (1/1) ... [2022-11-26 00:17:29,813 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:17:29" (1/1) ... [2022-11-26 00:17:29,825 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:17:29" (1/1) ... [2022-11-26 00:17:29,826 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:17:29" (1/1) ... [2022-11-26 00:17:29,829 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:17:29" (1/1) ... [2022-11-26 00:17:29,837 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:17:29" (1/1) ... [2022-11-26 00:17:29,840 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:17:29" (1/1) ... [2022-11-26 00:17:29,842 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:17:29" (1/1) ... [2022-11-26 00:17:29,843 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-26 00:17:29,850 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-26 00:17:29,850 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-26 00:17:29,850 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-26 00:17:29,852 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:17:29" (1/1) ... [2022-11-26 00:17:29,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:17:29,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a548448c-8919-48b0-8612-a517d9507910/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:17:29,888 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a548448c-8919-48b0-8612-a517d9507910/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-26 00:17:29,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a548448c-8919-48b0-8612-a517d9507910/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-26 00:17:29,936 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-26 00:17:29,936 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-26 00:17:29,937 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-26 00:17:29,937 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-26 00:17:29,937 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-26 00:17:29,937 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-26 00:17:29,937 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-26 00:17:29,938 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-26 00:17:30,013 INFO L235 CfgBuilder]: Building ICFG [2022-11-26 00:17:30,015 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-26 00:17:30,207 INFO L276 CfgBuilder]: Performing block encoding [2022-11-26 00:17:30,260 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-26 00:17:30,261 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-26 00:17:30,263 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:17:30 BoogieIcfgContainer [2022-11-26 00:17:30,263 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-26 00:17:30,267 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-26 00:17:30,267 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-26 00:17:30,270 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-26 00:17:30,270 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 12:17:29" (1/3) ... [2022-11-26 00:17:30,271 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a9d390e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:17:30, skipping insertion in model container [2022-11-26 00:17:30,271 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:17:29" (2/3) ... [2022-11-26 00:17:30,272 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a9d390e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:17:30, skipping insertion in model container [2022-11-26 00:17:30,272 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:17:30" (3/3) ... [2022-11-26 00:17:30,273 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd-ll_unwindbound20.c [2022-11-26 00:17:30,293 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-26 00:17:30,293 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-26 00:17:30,345 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-26 00:17:30,352 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@a6fdb4f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-26 00:17:30,352 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-26 00:17:30,357 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-26 00:17:30,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-26 00:17:30,370 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:17:30,371 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:17:30,371 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:17:30,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:17:30,380 INFO L85 PathProgramCache]: Analyzing trace with hash 2091718616, now seen corresponding path program 1 times [2022-11-26 00:17:30,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:17:30,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429208446] [2022-11-26 00:17:30,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:17:30,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:17:30,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:17:30,611 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 00:17:30,611 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:17:30,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429208446] [2022-11-26 00:17:30,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429208446] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:17:30,613 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:17:30,614 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-26 00:17:30,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792832576] [2022-11-26 00:17:30,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:17:30,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-26 00:17:30,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:17:30,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-26 00:17:30,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-26 00:17:30,679 INFO L87 Difference]: Start difference. First operand has 24 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-26 00:17:30,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:17:30,742 INFO L93 Difference]: Finished difference Result 42 states and 68 transitions. [2022-11-26 00:17:30,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-26 00:17:30,745 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 13 [2022-11-26 00:17:30,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:17:30,752 INFO L225 Difference]: With dead ends: 42 [2022-11-26 00:17:30,752 INFO L226 Difference]: Without dead ends: 22 [2022-11-26 00:17:30,757 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-26 00:17:30,763 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:17:30,764 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:17:30,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-11-26 00:17:30,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-11-26 00:17:30,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-26 00:17:30,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 30 transitions. [2022-11-26 00:17:30,806 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 30 transitions. Word has length 13 [2022-11-26 00:17:30,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:17:30,807 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 30 transitions. [2022-11-26 00:17:30,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-26 00:17:30,808 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 30 transitions. [2022-11-26 00:17:30,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-26 00:17:30,809 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:17:30,810 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:17:30,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-26 00:17:30,816 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:17:30,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:17:30,817 INFO L85 PathProgramCache]: Analyzing trace with hash -234462492, now seen corresponding path program 1 times [2022-11-26 00:17:30,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:17:30,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271724591] [2022-11-26 00:17:30,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:17:30,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:17:30,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:17:31,046 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 00:17:31,046 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:17:31,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271724591] [2022-11-26 00:17:31,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271724591] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:17:31,047 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:17:31,048 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 00:17:31,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538888705] [2022-11-26 00:17:31,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:17:31,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:17:31,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:17:31,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:17:31,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:17:31,051 INFO L87 Difference]: Start difference. First operand 22 states and 30 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-26 00:17:31,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:17:31,106 INFO L93 Difference]: Finished difference Result 34 states and 45 transitions. [2022-11-26 00:17:31,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 00:17:31,107 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 14 [2022-11-26 00:17:31,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:17:31,108 INFO L225 Difference]: With dead ends: 34 [2022-11-26 00:17:31,108 INFO L226 Difference]: Without dead ends: 24 [2022-11-26 00:17:31,109 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:17:31,110 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 3 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:17:31,110 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 69 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:17:31,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-11-26 00:17:31,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-11-26 00:17:31,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-26 00:17:31,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 32 transitions. [2022-11-26 00:17:31,128 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 32 transitions. Word has length 14 [2022-11-26 00:17:31,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:17:31,128 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 32 transitions. [2022-11-26 00:17:31,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-26 00:17:31,129 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 32 transitions. [2022-11-26 00:17:31,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-26 00:17:31,129 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:17:31,132 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:17:31,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-26 00:17:31,133 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:17:31,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:17:31,134 INFO L85 PathProgramCache]: Analyzing trace with hash -232794196, now seen corresponding path program 1 times [2022-11-26 00:17:31,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:17:31,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419169046] [2022-11-26 00:17:31,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:17:31,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:17:31,175 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 00:17:31,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [824781939] [2022-11-26 00:17:31,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:17:31,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:17:31,176 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a548448c-8919-48b0-8612-a517d9507910/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:17:31,193 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a548448c-8919-48b0-8612-a517d9507910/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:17:31,200 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a548448c-8919-48b0-8612-a517d9507910/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-26 00:17:31,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:17:31,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-26 00:17:31,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:17:31,425 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:17:31,425 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:17:31,425 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:17:31,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419169046] [2022-11-26 00:17:31,426 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 00:17:31,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824781939] [2022-11-26 00:17:31,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824781939] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:17:31,427 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:17:31,427 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-26 00:17:31,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270652122] [2022-11-26 00:17:31,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:17:31,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-26 00:17:31,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:17:31,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-26 00:17:31,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:17:31,430 INFO L87 Difference]: Start difference. First operand 24 states and 32 transitions. Second operand has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-26 00:17:31,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:17:31,609 INFO L93 Difference]: Finished difference Result 38 states and 52 transitions. [2022-11-26 00:17:31,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-26 00:17:31,612 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 14 [2022-11-26 00:17:31,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:17:31,613 INFO L225 Difference]: With dead ends: 38 [2022-11-26 00:17:31,613 INFO L226 Difference]: Without dead ends: 36 [2022-11-26 00:17:31,614 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-26 00:17:31,615 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 6 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:17:31,615 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 109 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:17:31,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-11-26 00:17:31,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2022-11-26 00:17:31,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 16 states have (on average 1.25) internal successors, (20), 18 states have internal predecessors, (20), 15 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-11-26 00:17:31,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 49 transitions. [2022-11-26 00:17:31,639 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 49 transitions. Word has length 14 [2022-11-26 00:17:31,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:17:31,646 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 49 transitions. [2022-11-26 00:17:31,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-26 00:17:31,646 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 49 transitions. [2022-11-26 00:17:31,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-26 00:17:31,647 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:17:31,647 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:17:31,661 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a548448c-8919-48b0-8612-a517d9507910/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-26 00:17:31,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a548448c-8919-48b0-8612-a517d9507910/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:17:31,862 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:17:31,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:17:31,862 INFO L85 PathProgramCache]: Analyzing trace with hash -1519768090, now seen corresponding path program 1 times [2022-11-26 00:17:31,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:17:31,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450203295] [2022-11-26 00:17:31,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:17:31,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:17:31,893 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 00:17:31,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [980858481] [2022-11-26 00:17:31,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:17:31,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:17:31,894 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a548448c-8919-48b0-8612-a517d9507910/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:17:31,898 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a548448c-8919-48b0-8612-a517d9507910/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:17:31,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a548448c-8919-48b0-8612-a517d9507910/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-26 00:17:31,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:17:31,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-26 00:17:31,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:17:32,193 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:17:32,193 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:17:32,193 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:17:32,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450203295] [2022-11-26 00:17:32,194 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 00:17:32,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980858481] [2022-11-26 00:17:32,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980858481] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:17:32,194 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:17:32,195 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-26 00:17:32,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650364243] [2022-11-26 00:17:32,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:17:32,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-26 00:17:32,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:17:32,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-26 00:17:32,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-11-26 00:17:32,197 INFO L87 Difference]: Start difference. First operand 35 states and 49 transitions. Second operand has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-26 00:17:32,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:17:32,353 INFO L93 Difference]: Finished difference Result 42 states and 55 transitions. [2022-11-26 00:17:32,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-26 00:17:32,354 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 19 [2022-11-26 00:17:32,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:17:32,358 INFO L225 Difference]: With dead ends: 42 [2022-11-26 00:17:32,358 INFO L226 Difference]: Without dead ends: 40 [2022-11-26 00:17:32,359 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-11-26 00:17:32,363 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 13 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:17:32,366 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 102 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:17:32,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-11-26 00:17:32,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2022-11-26 00:17:32,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 21 states have internal predecessors, (23), 15 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-11-26 00:17:32,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 52 transitions. [2022-11-26 00:17:32,392 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 52 transitions. Word has length 19 [2022-11-26 00:17:32,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:17:32,393 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 52 transitions. [2022-11-26 00:17:32,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-26 00:17:32,394 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 52 transitions. [2022-11-26 00:17:32,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-26 00:17:32,394 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:17:32,394 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:17:32,399 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a548448c-8919-48b0-8612-a517d9507910/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-26 00:17:32,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a548448c-8919-48b0-8612-a517d9507910/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:17:32,595 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:17:32,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:17:32,596 INFO L85 PathProgramCache]: Analyzing trace with hash -1808022612, now seen corresponding path program 1 times [2022-11-26 00:17:32,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:17:32,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510093141] [2022-11-26 00:17:32,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:17:32,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:17:32,609 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 00:17:32,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1556228842] [2022-11-26 00:17:32,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:17:32,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:17:32,610 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a548448c-8919-48b0-8612-a517d9507910/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:17:32,611 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a548448c-8919-48b0-8612-a517d9507910/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:17:32,618 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a548448c-8919-48b0-8612-a517d9507910/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-26 00:17:32,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:17:32,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-26 00:17:32,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:17:32,875 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 00:17:32,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:17:33,034 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:17:33,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510093141] [2022-11-26 00:17:33,034 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 00:17:33,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556228842] [2022-11-26 00:17:33,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556228842] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:17:33,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [613685311] [2022-11-26 00:17:33,055 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-11-26 00:17:33,055 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:17:33,059 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:17:33,064 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:17:33,064 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:17:33,707 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2022-11-26 00:17:33,720 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 69 for LOIs [2022-11-26 00:17:33,762 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:17:35,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [613685311] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:17:35,222 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:17:35,223 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [10] total 20 [2022-11-26 00:17:35,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824209581] [2022-11-26 00:17:35,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:17:35,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-26 00:17:35,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:17:35,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-26 00:17:35,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2022-11-26 00:17:35,225 INFO L87 Difference]: Start difference. First operand 39 states and 52 transitions. Second operand has 12 states, 8 states have (on average 1.25) internal successors, (10), 7 states have internal predecessors, (10), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-26 00:17:35,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:17:35,508 INFO L93 Difference]: Finished difference Result 46 states and 58 transitions. [2022-11-26 00:17:35,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-26 00:17:35,508 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 8 states have (on average 1.25) internal successors, (10), 7 states have internal predecessors, (10), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 24 [2022-11-26 00:17:35,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:17:35,512 INFO L225 Difference]: With dead ends: 46 [2022-11-26 00:17:35,512 INFO L226 Difference]: Without dead ends: 42 [2022-11-26 00:17:35,513 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 29 SyntacticMatches, 7 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2022-11-26 00:17:35,514 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 1 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:17:35,515 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 82 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:17:35,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-11-26 00:17:35,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2022-11-26 00:17:35,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 24 states have internal predecessors, (26), 14 states have call successors, (14), 5 states have call predecessors, (14), 5 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-11-26 00:17:35,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 52 transitions. [2022-11-26 00:17:35,546 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 52 transitions. Word has length 24 [2022-11-26 00:17:35,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:17:35,547 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 52 transitions. [2022-11-26 00:17:35,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 8 states have (on average 1.25) internal successors, (10), 7 states have internal predecessors, (10), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-26 00:17:35,547 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 52 transitions. [2022-11-26 00:17:35,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-26 00:17:35,549 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:17:35,549 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:17:35,560 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a548448c-8919-48b0-8612-a517d9507910/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-26 00:17:35,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a548448c-8919-48b0-8612-a517d9507910/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:17:35,755 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:17:35,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:17:35,756 INFO L85 PathProgramCache]: Analyzing trace with hash -1397146583, now seen corresponding path program 1 times [2022-11-26 00:17:35,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:17:35,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311591576] [2022-11-26 00:17:35,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:17:35,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:17:35,767 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 00:17:35,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [118083405] [2022-11-26 00:17:35,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:17:35,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:17:35,768 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a548448c-8919-48b0-8612-a517d9507910/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:17:35,769 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a548448c-8919-48b0-8612-a517d9507910/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:17:35,789 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a548448c-8919-48b0-8612-a517d9507910/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-26 00:17:35,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:17:35,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-26 00:17:35,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:17:35,858 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-26 00:17:35,858 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:17:35,858 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:17:35,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311591576] [2022-11-26 00:17:35,861 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 00:17:35,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118083405] [2022-11-26 00:17:35,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118083405] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:17:35,862 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:17:35,862 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-26 00:17:35,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715316893] [2022-11-26 00:17:35,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:17:35,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:17:35,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:17:35,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:17:35,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:17:35,865 INFO L87 Difference]: Start difference. First operand 42 states and 52 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-11-26 00:17:35,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:17:35,931 INFO L93 Difference]: Finished difference Result 52 states and 64 transitions. [2022-11-26 00:17:35,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:17:35,931 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 30 [2022-11-26 00:17:35,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:17:35,934 INFO L225 Difference]: With dead ends: 52 [2022-11-26 00:17:35,934 INFO L226 Difference]: Without dead ends: 50 [2022-11-26 00:17:35,934 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:17:35,937 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 5 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:17:35,938 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 100 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:17:35,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-11-26 00:17:35,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2022-11-26 00:17:35,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 25 states have (on average 1.16) internal successors, (29), 28 states have internal predecessors, (29), 15 states have call successors, (15), 6 states have call predecessors, (15), 6 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-26 00:17:35,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 57 transitions. [2022-11-26 00:17:35,985 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 57 transitions. Word has length 30 [2022-11-26 00:17:35,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:17:35,985 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 57 transitions. [2022-11-26 00:17:35,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-11-26 00:17:35,986 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 57 transitions. [2022-11-26 00:17:35,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-26 00:17:35,987 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:17:35,987 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:17:36,002 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a548448c-8919-48b0-8612-a517d9507910/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-26 00:17:36,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a548448c-8919-48b0-8612-a517d9507910/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-26 00:17:36,199 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:17:36,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:17:36,200 INFO L85 PathProgramCache]: Analyzing trace with hash 882095404, now seen corresponding path program 1 times [2022-11-26 00:17:36,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:17:36,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662051700] [2022-11-26 00:17:36,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:17:36,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:17:36,212 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 00:17:36,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [863953053] [2022-11-26 00:17:36,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:17:36,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:17:36,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a548448c-8919-48b0-8612-a517d9507910/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:17:36,215 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a548448c-8919-48b0-8612-a517d9507910/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:17:36,234 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a548448c-8919-48b0-8612-a517d9507910/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-26 00:17:36,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:17:36,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-26 00:17:36,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:17:36,326 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-26 00:17:36,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:17:36,380 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-26 00:17:36,380 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:17:36,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662051700] [2022-11-26 00:17:36,381 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 00:17:36,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863953053] [2022-11-26 00:17:36,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863953053] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:17:36,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1606642532] [2022-11-26 00:17:36,385 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2022-11-26 00:17:36,385 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:17:36,386 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:17:36,386 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:17:36,386 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:17:39,133 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 11 for LOIs [2022-11-26 00:17:39,138 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 69 for LOIs [2022-11-26 00:17:39,166 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:17:40,479 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1260#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:17:40,480 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:17:40,480 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-26 00:17:40,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2022-11-26 00:17:40,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514290758] [2022-11-26 00:17:40,480 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-26 00:17:40,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-26 00:17:40,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:17:40,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-26 00:17:40,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2022-11-26 00:17:40,482 INFO L87 Difference]: Start difference. First operand 47 states and 57 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 5 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-11-26 00:17:40,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:17:40,647 INFO L93 Difference]: Finished difference Result 109 states and 132 transitions. [2022-11-26 00:17:40,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-26 00:17:40,648 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 5 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 32 [2022-11-26 00:17:40,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:17:40,650 INFO L225 Difference]: With dead ends: 109 [2022-11-26 00:17:40,650 INFO L226 Difference]: Without dead ends: 97 [2022-11-26 00:17:40,651 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=121, Invalid=581, Unknown=0, NotChecked=0, Total=702 [2022-11-26 00:17:40,651 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 51 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:17:40,652 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 167 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:17:40,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-11-26 00:17:40,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 91. [2022-11-26 00:17:40,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 50 states have (on average 1.16) internal successors, (58), 54 states have internal predecessors, (58), 29 states have call successors, (29), 12 states have call predecessors, (29), 11 states have return successors, (25), 24 states have call predecessors, (25), 25 states have call successors, (25) [2022-11-26 00:17:40,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 112 transitions. [2022-11-26 00:17:40,679 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 112 transitions. Word has length 32 [2022-11-26 00:17:40,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:17:40,681 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 112 transitions. [2022-11-26 00:17:40,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 5 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-11-26 00:17:40,682 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 112 transitions. [2022-11-26 00:17:40,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-26 00:17:40,688 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:17:40,688 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:17:40,699 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a548448c-8919-48b0-8612-a517d9507910/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-26 00:17:40,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a548448c-8919-48b0-8612-a517d9507910/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:17:40,894 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:17:40,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:17:40,894 INFO L85 PathProgramCache]: Analyzing trace with hash 883763700, now seen corresponding path program 1 times [2022-11-26 00:17:40,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:17:40,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527239840] [2022-11-26 00:17:40,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:17:40,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:17:40,914 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 00:17:40,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [592993291] [2022-11-26 00:17:40,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:17:40,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:17:40,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a548448c-8919-48b0-8612-a517d9507910/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:17:40,923 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a548448c-8919-48b0-8612-a517d9507910/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:17:40,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a548448c-8919-48b0-8612-a517d9507910/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-26 00:17:40,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:17:40,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-26 00:17:40,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:17:41,186 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-26 00:17:41,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:17:41,342 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-26 00:17:41,343 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:17:41,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527239840] [2022-11-26 00:17:41,343 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 00:17:41,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592993291] [2022-11-26 00:17:41,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592993291] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-26 00:17:41,344 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:17:41,344 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 10 [2022-11-26 00:17:41,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050265322] [2022-11-26 00:17:41,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:17:41,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:17:41,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:17:41,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:17:41,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-11-26 00:17:41,346 INFO L87 Difference]: Start difference. First operand 91 states and 112 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-26 00:17:41,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:17:41,427 INFO L93 Difference]: Finished difference Result 105 states and 125 transitions. [2022-11-26 00:17:41,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-26 00:17:41,428 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 32 [2022-11-26 00:17:41,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:17:41,430 INFO L225 Difference]: With dead ends: 105 [2022-11-26 00:17:41,430 INFO L226 Difference]: Without dead ends: 103 [2022-11-26 00:17:41,431 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-11-26 00:17:41,432 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 8 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:17:41,432 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 63 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:17:41,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-11-26 00:17:41,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2022-11-26 00:17:41,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 59 states have (on average 1.1355932203389831) internal successors, (67), 63 states have internal predecessors, (67), 29 states have call successors, (29), 15 states have call predecessors, (29), 14 states have return successors, (25), 24 states have call predecessors, (25), 25 states have call successors, (25) [2022-11-26 00:17:41,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 121 transitions. [2022-11-26 00:17:41,467 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 121 transitions. Word has length 32 [2022-11-26 00:17:41,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:17:41,467 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 121 transitions. [2022-11-26 00:17:41,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-26 00:17:41,468 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 121 transitions. [2022-11-26 00:17:41,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-26 00:17:41,468 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:17:41,469 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:17:41,479 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a548448c-8919-48b0-8612-a517d9507910/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-26 00:17:41,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a548448c-8919-48b0-8612-a517d9507910/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:17:41,675 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:17:41,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:17:41,676 INFO L85 PathProgramCache]: Analyzing trace with hash 481580745, now seen corresponding path program 1 times [2022-11-26 00:17:41,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:17:41,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105100069] [2022-11-26 00:17:41,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:17:41,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:17:41,684 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 00:17:41,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1336773560] [2022-11-26 00:17:41,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:17:41,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:17:41,685 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a548448c-8919-48b0-8612-a517d9507910/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:17:41,687 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a548448c-8919-48b0-8612-a517d9507910/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:17:41,703 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a548448c-8919-48b0-8612-a517d9507910/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-26 00:17:41,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:17:41,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-26 00:17:41,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:17:41,836 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 15 proven. 5 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-26 00:17:41,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:17:41,969 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 15 proven. 5 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-26 00:17:41,970 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:17:41,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105100069] [2022-11-26 00:17:41,970 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 00:17:41,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336773560] [2022-11-26 00:17:41,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1336773560] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:17:41,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1543010588] [2022-11-26 00:17:41,973 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2022-11-26 00:17:41,973 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:17:41,973 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:17:41,974 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:17:41,974 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:17:42,422 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2022-11-26 00:17:42,432 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 69 for LOIs [2022-11-26 00:17:42,459 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:17:44,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1543010588] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:17:44,219 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-26 00:17:44,219 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [9, 8] total 23 [2022-11-26 00:17:44,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927812579] [2022-11-26 00:17:44,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:17:44,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-26 00:17:44,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:17:44,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-26 00:17:44,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2022-11-26 00:17:44,222 INFO L87 Difference]: Start difference. First operand 103 states and 121 transitions. Second operand has 13 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 8 states have internal predecessors, (11), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-26 00:17:44,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:17:44,512 INFO L93 Difference]: Finished difference Result 105 states and 122 transitions. [2022-11-26 00:17:44,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-26 00:17:44,513 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 8 states have internal predecessors, (11), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 35 [2022-11-26 00:17:44,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:17:44,518 INFO L225 Difference]: With dead ends: 105 [2022-11-26 00:17:44,518 INFO L226 Difference]: Without dead ends: 95 [2022-11-26 00:17:44,520 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 70 SyntacticMatches, 12 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2022-11-26 00:17:44,523 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 0 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:17:44,524 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 85 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 00:17:44,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-11-26 00:17:44,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2022-11-26 00:17:44,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 54 states have (on average 1.1296296296296295) internal successors, (61), 58 states have internal predecessors, (61), 27 states have call successors, (27), 13 states have call predecessors, (27), 13 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2022-11-26 00:17:44,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 112 transitions. [2022-11-26 00:17:44,551 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 112 transitions. Word has length 35 [2022-11-26 00:17:44,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:17:44,551 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 112 transitions. [2022-11-26 00:17:44,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 8 states have internal predecessors, (11), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-26 00:17:44,552 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 112 transitions. [2022-11-26 00:17:44,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-26 00:17:44,553 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:17:44,553 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:17:44,563 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a548448c-8919-48b0-8612-a517d9507910/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-26 00:17:44,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a548448c-8919-48b0-8612-a517d9507910/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:17:44,760 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:17:44,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:17:44,760 INFO L85 PathProgramCache]: Analyzing trace with hash 1530726558, now seen corresponding path program 2 times [2022-11-26 00:17:44,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:17:44,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155071512] [2022-11-26 00:17:44,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:17:44,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:17:44,776 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 00:17:44,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1668322946] [2022-11-26 00:17:44,790 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:17:44,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:17:44,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a548448c-8919-48b0-8612-a517d9507910/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:17:44,794 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a548448c-8919-48b0-8612-a517d9507910/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:17:44,821 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a548448c-8919-48b0-8612-a517d9507910/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-26 00:17:44,856 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-26 00:17:44,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:17:44,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-26 00:17:44,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:17:45,258 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-26 00:17:45,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:17:45,615 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-26 00:17:45,615 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:17:45,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155071512] [2022-11-26 00:17:45,616 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 00:17:45,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668322946] [2022-11-26 00:17:45,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668322946] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:17:45,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1901725606] [2022-11-26 00:17:45,619 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2022-11-26 00:17:45,619 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:17:45,619 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:17:45,620 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:17:45,620 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:17:47,866 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 11 for LOIs [2022-11-26 00:17:47,871 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 69 for LOIs [2022-11-26 00:17:47,897 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:17:50,418 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2833#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:17:50,418 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:17:50,418 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-26 00:17:50,418 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 13 [2022-11-26 00:17:50,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566144125] [2022-11-26 00:17:50,418 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-26 00:17:50,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-26 00:17:50,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:17:50,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-26 00:17:50,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=658, Unknown=0, NotChecked=0, Total=756 [2022-11-26 00:17:50,420 INFO L87 Difference]: Start difference. First operand 95 states and 112 transitions. Second operand has 13 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 6 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 7 states have call predecessors, (12), 6 states have call successors, (12) [2022-11-26 00:17:53,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:17:53,353 INFO L93 Difference]: Finished difference Result 108 states and 126 transitions. [2022-11-26 00:17:53,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-26 00:17:53,354 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 6 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 7 states have call predecessors, (12), 6 states have call successors, (12) Word has length 37 [2022-11-26 00:17:53,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:17:53,355 INFO L225 Difference]: With dead ends: 108 [2022-11-26 00:17:53,355 INFO L226 Difference]: Without dead ends: 106 [2022-11-26 00:17:53,356 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=136, Invalid=920, Unknown=0, NotChecked=0, Total=1056 [2022-11-26 00:17:53,356 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 32 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-26 00:17:53,356 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 174 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-26 00:17:53,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-11-26 00:17:53,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 103. [2022-11-26 00:17:53,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 60 states have (on average 1.1166666666666667) internal successors, (67), 64 states have internal predecessors, (67), 27 states have call successors, (27), 15 states have call predecessors, (27), 15 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2022-11-26 00:17:53,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 118 transitions. [2022-11-26 00:17:53,380 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 118 transitions. Word has length 37 [2022-11-26 00:17:53,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:17:53,380 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 118 transitions. [2022-11-26 00:17:53,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 6 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 7 states have call predecessors, (12), 6 states have call successors, (12) [2022-11-26 00:17:53,381 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 118 transitions. [2022-11-26 00:17:53,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-26 00:17:53,381 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:17:53,382 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:17:53,387 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a548448c-8919-48b0-8612-a517d9507910/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-11-26 00:17:53,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a548448c-8919-48b0-8612-a517d9507910/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:17:53,588 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:17:53,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:17:53,588 INFO L85 PathProgramCache]: Analyzing trace with hash -333653004, now seen corresponding path program 3 times [2022-11-26 00:17:53,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:17:53,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588189224] [2022-11-26 00:17:53,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:17:53,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:17:53,596 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 00:17:53,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1179382117] [2022-11-26 00:17:53,596 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-26 00:17:53,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:17:53,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a548448c-8919-48b0-8612-a517d9507910/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:17:53,598 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a548448c-8919-48b0-8612-a517d9507910/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:17:53,626 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a548448c-8919-48b0-8612-a517d9507910/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-26 00:17:53,659 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-26 00:17:53,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:17:53,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 39 conjunts are in the unsatisfiable core [2022-11-26 00:17:53,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:17:54,198 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 16 proven. 18 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-26 00:17:54,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:17:54,957 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 20 proven. 13 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-26 00:17:54,957 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:17:54,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588189224] [2022-11-26 00:17:54,957 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 00:17:54,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179382117] [2022-11-26 00:17:54,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1179382117] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:17:54,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1735904114] [2022-11-26 00:17:54,960 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2022-11-26 00:17:54,960 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:17:54,960 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:17:54,961 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:17:54,961 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:17:57,082 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 11 for LOIs [2022-11-26 00:17:57,087 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 69 for LOIs [2022-11-26 00:17:57,113 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:17:59,546 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3429#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:17:59,546 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:17:59,546 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-26 00:17:59,546 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2022-11-26 00:17:59,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767640666] [2022-11-26 00:17:59,546 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-26 00:17:59,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-26 00:17:59,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:17:59,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-26 00:17:59,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=870, Unknown=0, NotChecked=0, Total=992 [2022-11-26 00:17:59,549 INFO L87 Difference]: Start difference. First operand 103 states and 118 transitions. Second operand has 17 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 11 states have internal predecessors, (28), 8 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 7 states have call predecessors, (14), 8 states have call successors, (14) [2022-11-26 00:18:01,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:18:01,016 INFO L93 Difference]: Finished difference Result 120 states and 136 transitions. [2022-11-26 00:18:01,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-26 00:18:01,017 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 11 states have internal predecessors, (28), 8 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 7 states have call predecessors, (14), 8 states have call successors, (14) Word has length 42 [2022-11-26 00:18:01,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:18:01,018 INFO L225 Difference]: With dead ends: 120 [2022-11-26 00:18:01,018 INFO L226 Difference]: Without dead ends: 106 [2022-11-26 00:18:01,019 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 95 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=176, Invalid=1230, Unknown=0, NotChecked=0, Total=1406 [2022-11-26 00:18:01,021 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 37 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 341 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:18:01,021 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 79 Invalid, 411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 341 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-26 00:18:01,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-11-26 00:18:01,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 97. [2022-11-26 00:18:01,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 62 states have (on average 1.0806451612903225) internal successors, (67), 64 states have internal predecessors, (67), 19 states have call successors, (19), 16 states have call predecessors, (19), 15 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2022-11-26 00:18:01,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 103 transitions. [2022-11-26 00:18:01,041 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 103 transitions. Word has length 42 [2022-11-26 00:18:01,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:18:01,042 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 103 transitions. [2022-11-26 00:18:01,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 11 states have internal predecessors, (28), 8 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 7 states have call predecessors, (14), 8 states have call successors, (14) [2022-11-26 00:18:01,042 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 103 transitions. [2022-11-26 00:18:01,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-26 00:18:01,043 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:18:01,043 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:18:01,049 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a548448c-8919-48b0-8612-a517d9507910/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-26 00:18:01,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a548448c-8919-48b0-8612-a517d9507910/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-26 00:18:01,249 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:18:01,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:18:01,250 INFO L85 PathProgramCache]: Analyzing trace with hash -1884634751, now seen corresponding path program 1 times [2022-11-26 00:18:01,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:18:01,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156911678] [2022-11-26 00:18:01,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:18:01,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:18:01,258 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 00:18:01,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [183134602] [2022-11-26 00:18:01,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:18:01,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:18:01,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a548448c-8919-48b0-8612-a517d9507910/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:18:01,260 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a548448c-8919-48b0-8612-a517d9507910/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:18:01,265 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a548448c-8919-48b0-8612-a517d9507910/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-26 00:18:01,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:18:01,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-26 00:18:01,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:18:01,387 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 41 proven. 5 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-26 00:18:01,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:18:01,510 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 41 proven. 5 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-26 00:18:01,510 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:18:01,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156911678] [2022-11-26 00:18:01,511 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 00:18:01,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183134602] [2022-11-26 00:18:01,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183134602] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:18:01,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1602548475] [2022-11-26 00:18:01,513 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2022-11-26 00:18:01,513 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:18:01,514 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:18:01,514 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:18:01,514 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:18:03,973 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 11 for LOIs [2022-11-26 00:18:03,978 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 69 for LOIs [2022-11-26 00:18:04,007 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:18:17,709 WARN L233 SmtUtils]: Spent 11.29s on a formula simplification. DAG size of input: 61 DAG size of output: 53 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:18:20,452 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4093#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:18:20,452 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:18:20,452 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-26 00:18:20,453 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2022-11-26 00:18:20,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131735419] [2022-11-26 00:18:20,453 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-26 00:18:20,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-26 00:18:20,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:18:20,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-26 00:18:20,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=645, Unknown=0, NotChecked=0, Total=756 [2022-11-26 00:18:20,454 INFO L87 Difference]: Start difference. First operand 97 states and 103 transitions. Second operand has 12 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 5 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) [2022-11-26 00:18:20,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:18:20,723 INFO L93 Difference]: Finished difference Result 104 states and 109 transitions. [2022-11-26 00:18:20,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-26 00:18:20,723 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 5 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) Word has length 53 [2022-11-26 00:18:20,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:18:20,724 INFO L225 Difference]: With dead ends: 104 [2022-11-26 00:18:20,724 INFO L226 Difference]: Without dead ends: 84 [2022-11-26 00:18:20,725 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 130 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 16.5s TimeCoverageRelationStatistics Valid=127, Invalid=743, Unknown=0, NotChecked=0, Total=870 [2022-11-26 00:18:20,726 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 15 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:18:20,726 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 72 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:18:20,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-11-26 00:18:20,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2022-11-26 00:18:20,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 54 states have (on average 1.037037037037037) internal successors, (56), 55 states have internal predecessors, (56), 16 states have call successors, (16), 13 states have call predecessors, (16), 13 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-26 00:18:20,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 87 transitions. [2022-11-26 00:18:20,747 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 87 transitions. Word has length 53 [2022-11-26 00:18:20,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:18:20,747 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 87 transitions. [2022-11-26 00:18:20,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 5 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) [2022-11-26 00:18:20,748 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 87 transitions. [2022-11-26 00:18:20,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-26 00:18:20,749 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:18:20,749 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:18:20,755 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a548448c-8919-48b0-8612-a517d9507910/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-26 00:18:20,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a548448c-8919-48b0-8612-a517d9507910/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-26 00:18:20,955 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:18:20,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:18:20,955 INFO L85 PathProgramCache]: Analyzing trace with hash -1445886962, now seen corresponding path program 4 times [2022-11-26 00:18:20,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:18:20,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337410856] [2022-11-26 00:18:20,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:18:20,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:18:20,969 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 00:18:20,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [552250338] [2022-11-26 00:18:20,970 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-26 00:18:20,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:18:20,970 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a548448c-8919-48b0-8612-a517d9507910/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:18:20,971 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a548448c-8919-48b0-8612-a517d9507910/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:18:20,972 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a548448c-8919-48b0-8612-a517d9507910/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-26 00:18:21,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:18:21,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 46 conjunts are in the unsatisfiable core [2022-11-26 00:18:21,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:18:24,193 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 65 proven. 48 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2022-11-26 00:18:24,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:18:24,708 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 76 proven. 8 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2022-11-26 00:18:24,708 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:18:24,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337410856] [2022-11-26 00:18:24,710 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 00:18:24,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552250338] [2022-11-26 00:18:24,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552250338] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:18:24,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [704104236] [2022-11-26 00:18:24,712 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2022-11-26 00:18:24,713 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:18:24,713 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:18:24,713 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:18:24,713 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:18:26,824 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 11 for LOIs [2022-11-26 00:18:26,828 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 69 for LOIs [2022-11-26 00:18:26,851 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:18:29,640 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4827#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:18:29,640 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:18:29,640 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-26 00:18:29,640 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 18 [2022-11-26 00:18:29,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022311920] [2022-11-26 00:18:29,641 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-26 00:18:29,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-26 00:18:29,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:18:29,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-26 00:18:29,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=923, Unknown=0, NotChecked=0, Total=1056 [2022-11-26 00:18:29,643 INFO L87 Difference]: Start difference. First operand 84 states and 87 transitions. Second operand has 18 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 13 states have internal predecessors, (35), 8 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (20), 10 states have call predecessors, (20), 8 states have call successors, (20) [2022-11-26 00:18:32,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:18:32,338 INFO L93 Difference]: Finished difference Result 94 states and 99 transitions. [2022-11-26 00:18:32,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-26 00:18:32,338 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 13 states have internal predecessors, (35), 8 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (20), 10 states have call predecessors, (20), 8 states have call successors, (20) Word has length 73 [2022-11-26 00:18:32,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:18:32,339 INFO L225 Difference]: With dead ends: 94 [2022-11-26 00:18:32,339 INFO L226 Difference]: Without dead ends: 92 [2022-11-26 00:18:32,340 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 185 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=180, Invalid=1226, Unknown=0, NotChecked=0, Total=1406 [2022-11-26 00:18:32,341 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 29 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 335 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-26 00:18:32,341 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 105 Invalid, 378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 335 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-26 00:18:32,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-11-26 00:18:32,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 88. [2022-11-26 00:18:32,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 57 states have (on average 1.0350877192982457) internal successors, (59), 58 states have internal predecessors, (59), 16 states have call successors, (16), 14 states have call predecessors, (16), 14 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-26 00:18:32,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 90 transitions. [2022-11-26 00:18:32,364 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 90 transitions. Word has length 73 [2022-11-26 00:18:32,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:18:32,365 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 90 transitions. [2022-11-26 00:18:32,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 13 states have internal predecessors, (35), 8 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (20), 10 states have call predecessors, (20), 8 states have call successors, (20) [2022-11-26 00:18:32,365 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 90 transitions. [2022-11-26 00:18:32,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-26 00:18:32,367 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:18:32,367 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 5, 4, 4, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:18:32,373 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a548448c-8919-48b0-8612-a517d9507910/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-26 00:18:32,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a548448c-8919-48b0-8612-a517d9507910/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-26 00:18:32,573 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:18:32,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:18:32,573 INFO L85 PathProgramCache]: Analyzing trace with hash -1678794748, now seen corresponding path program 2 times [2022-11-26 00:18:32,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:18:32,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147663959] [2022-11-26 00:18:32,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:18:32,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:18:32,588 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 00:18:32,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1763917297] [2022-11-26 00:18:32,588 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:18:32,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:18:32,589 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a548448c-8919-48b0-8612-a517d9507910/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:18:32,590 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a548448c-8919-48b0-8612-a517d9507910/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:18:32,594 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a548448c-8919-48b0-8612-a517d9507910/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-26 00:18:32,680 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-11-26 00:18:32,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:18:32,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-26 00:18:32,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:18:32,813 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 24 proven. 260 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-11-26 00:18:32,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:18:32,964 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 24 proven. 44 refuted. 0 times theorem prover too weak. 266 trivial. 0 not checked. [2022-11-26 00:18:32,965 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:18:32,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147663959] [2022-11-26 00:18:32,965 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 00:18:32,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763917297] [2022-11-26 00:18:32,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1763917297] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:18:32,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1460135170] [2022-11-26 00:18:32,968 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2022-11-26 00:18:32,968 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:18:32,969 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:18:32,969 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:18:32,969 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:18:34,972 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 11 for LOIs [2022-11-26 00:18:34,978 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 69 for LOIs [2022-11-26 00:18:34,999 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:18:37,088 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5633#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:18:37,089 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:18:37,089 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-26 00:18:37,089 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2022-11-26 00:18:37,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556901498] [2022-11-26 00:18:37,089 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-26 00:18:37,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-26 00:18:37,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:18:37,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-26 00:18:37,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=688, Unknown=0, NotChecked=0, Total=870 [2022-11-26 00:18:37,092 INFO L87 Difference]: Start difference. First operand 88 states and 90 transitions. Second operand has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 11 states have call successors, (29), 7 states have call predecessors, (29), 6 states have return successors, (28), 10 states have call predecessors, (28), 10 states have call successors, (28) [2022-11-26 00:18:37,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:18:37,418 INFO L93 Difference]: Finished difference Result 204 states and 212 transitions. [2022-11-26 00:18:37,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-26 00:18:37,419 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 11 states have call successors, (29), 7 states have call predecessors, (29), 6 states have return successors, (28), 10 states have call predecessors, (28), 10 states have call successors, (28) Word has length 86 [2022-11-26 00:18:37,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:18:37,420 INFO L225 Difference]: With dead ends: 204 [2022-11-26 00:18:37,420 INFO L226 Difference]: Without dead ends: 196 [2022-11-26 00:18:37,421 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=295, Invalid=1187, Unknown=0, NotChecked=0, Total=1482 [2022-11-26 00:18:37,422 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 47 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:18:37,422 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 144 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:18:37,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2022-11-26 00:18:37,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 196. [2022-11-26 00:18:37,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 129 states have (on average 1.0155038759689923) internal successors, (131), 130 states have internal predecessors, (131), 34 states have call successors, (34), 32 states have call predecessors, (34), 32 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2022-11-26 00:18:37,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 198 transitions. [2022-11-26 00:18:37,460 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 198 transitions. Word has length 86 [2022-11-26 00:18:37,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:18:37,461 INFO L495 AbstractCegarLoop]: Abstraction has 196 states and 198 transitions. [2022-11-26 00:18:37,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 11 states have call successors, (29), 7 states have call predecessors, (29), 6 states have return successors, (28), 10 states have call predecessors, (28), 10 states have call successors, (28) [2022-11-26 00:18:37,461 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 198 transitions. [2022-11-26 00:18:37,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-11-26 00:18:37,463 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:18:37,463 INFO L195 NwaCegarLoop]: trace histogram [31, 30, 30, 11, 10, 10, 10, 10, 10, 10, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:18:37,469 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a548448c-8919-48b0-8612-a517d9507910/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-26 00:18:37,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a548448c-8919-48b0-8612-a517d9507910/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:18:37,669 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:18:37,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:18:37,670 INFO L85 PathProgramCache]: Analyzing trace with hash -926531660, now seen corresponding path program 3 times [2022-11-26 00:18:37,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:18:37,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014963319] [2022-11-26 00:18:37,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:18:37,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:18:37,689 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 00:18:37,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1172630301] [2022-11-26 00:18:37,689 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-26 00:18:37,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:18:37,690 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a548448c-8919-48b0-8612-a517d9507910/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:18:37,691 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a548448c-8919-48b0-8612-a517d9507910/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:18:37,693 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a548448c-8919-48b0-8612-a517d9507910/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-26 00:18:37,836 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-26 00:18:37,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:18:37,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-26 00:18:37,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:18:38,143 INFO L134 CoverageAnalysis]: Checked inductivity of 2092 backedges. 60 proven. 1910 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2022-11-26 00:18:38,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:18:38,502 INFO L134 CoverageAnalysis]: Checked inductivity of 2092 backedges. 60 proven. 290 refuted. 0 times theorem prover too weak. 1742 trivial. 0 not checked. [2022-11-26 00:18:38,502 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:18:38,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014963319] [2022-11-26 00:18:38,502 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 00:18:38,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172630301] [2022-11-26 00:18:38,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172630301] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:18:38,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1788235234] [2022-11-26 00:18:38,504 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2022-11-26 00:18:38,504 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:18:38,505 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:18:38,505 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:18:38,505 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:18:40,438 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 11 for LOIs [2022-11-26 00:18:40,442 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 69 for LOIs [2022-11-26 00:18:40,464 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:18:42,622 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7406#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:18:42,622 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:18:42,622 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-26 00:18:42,623 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2022-11-26 00:18:42,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987851605] [2022-11-26 00:18:42,623 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-26 00:18:42,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-26 00:18:42,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:18:42,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-26 00:18:42,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=397, Invalid=1163, Unknown=0, NotChecked=0, Total=1560 [2022-11-26 00:18:42,626 INFO L87 Difference]: Start difference. First operand 196 states and 198 transitions. Second operand has 24 states, 24 states have (on average 4.291666666666667) internal successors, (103), 24 states have internal predecessors, (103), 21 states have call successors, (65), 13 states have call predecessors, (65), 12 states have return successors, (64), 20 states have call predecessors, (64), 20 states have call successors, (64) [2022-11-26 00:18:43,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:18:43,434 INFO L93 Difference]: Finished difference Result 384 states and 396 transitions. [2022-11-26 00:18:43,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-11-26 00:18:43,435 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.291666666666667) internal successors, (103), 24 states have internal predecessors, (103), 21 states have call successors, (65), 13 states have call predecessors, (65), 12 states have return successors, (64), 20 states have call predecessors, (64), 20 states have call successors, (64) Word has length 194 [2022-11-26 00:18:43,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:18:43,437 INFO L225 Difference]: With dead ends: 384 [2022-11-26 00:18:43,437 INFO L226 Difference]: Without dead ends: 376 [2022-11-26 00:18:43,439 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 599 GetRequests, 540 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1082 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=826, Invalid=2596, Unknown=0, NotChecked=0, Total=3422 [2022-11-26 00:18:43,440 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 66 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-26 00:18:43,440 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 337 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-26 00:18:43,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2022-11-26 00:18:43,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 376. [2022-11-26 00:18:43,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 249 states have (on average 1.0080321285140563) internal successors, (251), 250 states have internal predecessors, (251), 64 states have call successors, (64), 62 states have call predecessors, (64), 62 states have return successors, (63), 63 states have call predecessors, (63), 63 states have call successors, (63) [2022-11-26 00:18:43,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 378 transitions. [2022-11-26 00:18:43,521 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 378 transitions. Word has length 194 [2022-11-26 00:18:43,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:18:43,522 INFO L495 AbstractCegarLoop]: Abstraction has 376 states and 378 transitions. [2022-11-26 00:18:43,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.291666666666667) internal successors, (103), 24 states have internal predecessors, (103), 21 states have call successors, (65), 13 states have call predecessors, (65), 12 states have return successors, (64), 20 states have call predecessors, (64), 20 states have call successors, (64) [2022-11-26 00:18:43,523 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 378 transitions. [2022-11-26 00:18:43,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 375 [2022-11-26 00:18:43,528 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:18:43,528 INFO L195 NwaCegarLoop]: trace histogram [61, 60, 60, 21, 20, 20, 20, 20, 20, 20, 20, 20, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:18:43,533 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a548448c-8919-48b0-8612-a517d9507910/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-26 00:18:43,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a548448c-8919-48b0-8612-a517d9507910/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-26 00:18:43,729 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:18:43,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:18:43,729 INFO L85 PathProgramCache]: Analyzing trace with hash -1809623932, now seen corresponding path program 4 times [2022-11-26 00:18:43,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:18:43,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817858362] [2022-11-26 00:18:43,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:18:43,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:18:43,748 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 00:18:43,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1909232195] [2022-11-26 00:18:43,749 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-26 00:18:43,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:18:43,749 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a548448c-8919-48b0-8612-a517d9507910/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:18:43,750 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a548448c-8919-48b0-8612-a517d9507910/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:18:43,758 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a548448c-8919-48b0-8612-a517d9507910/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-26 00:18:44,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-26 00:18:44,198 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-26 00:18:44,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-26 00:18:44,611 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-26 00:18:44,611 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-11-26 00:18:44,612 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-26 00:18:44,628 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a548448c-8919-48b0-8612-a517d9507910/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-26 00:18:44,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a548448c-8919-48b0-8612-a517d9507910/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-26 00:18:44,827 INFO L445 BasicCegarLoop]: Path program histogram: [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:18:44,831 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-26 00:18:44,975 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.11 12:18:44 BoogieIcfgContainer [2022-11-26 00:18:44,975 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-26 00:18:44,976 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-26 00:18:44,976 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-26 00:18:44,976 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-26 00:18:44,976 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:17:30" (3/4) ... [2022-11-26 00:18:44,978 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-11-26 00:18:45,153 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a548448c-8919-48b0-8612-a517d9507910/bin/utaipan-ByfvJB40ur/witness.graphml [2022-11-26 00:18:45,154 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-26 00:18:45,154 INFO L158 Benchmark]: Toolchain (without parser) took 75633.41ms. Allocated memory was 178.3MB in the beginning and 432.0MB in the end (delta: 253.8MB). Free memory was 146.7MB in the beginning and 172.4MB in the end (delta: -25.6MB). Peak memory consumption was 228.8MB. Max. memory is 16.1GB. [2022-11-26 00:18:45,155 INFO L158 Benchmark]: CDTParser took 0.22ms. Allocated memory is still 113.2MB. Free memory is still 63.0MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-26 00:18:45,155 INFO L158 Benchmark]: CACSL2BoogieTranslator took 238.39ms. Allocated memory is still 178.3MB. Free memory was 146.7MB in the beginning and 135.6MB in the end (delta: 11.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-26 00:18:45,155 INFO L158 Benchmark]: Boogie Procedure Inliner took 39.69ms. Allocated memory is still 178.3MB. Free memory was 135.6MB in the beginning and 134.0MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-26 00:18:45,156 INFO L158 Benchmark]: Boogie Preprocessor took 47.24ms. Allocated memory is still 178.3MB. Free memory was 134.0MB in the beginning and 132.7MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-26 00:18:45,156 INFO L158 Benchmark]: RCFGBuilder took 413.65ms. Allocated memory is still 178.3MB. Free memory was 132.7MB in the beginning and 119.5MB in the end (delta: 13.3MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2022-11-26 00:18:45,156 INFO L158 Benchmark]: TraceAbstraction took 74708.57ms. Allocated memory was 178.3MB in the beginning and 432.0MB in the end (delta: 253.8MB). Free memory was 118.8MB in the beginning and 186.0MB in the end (delta: -67.2MB). Peak memory consumption was 188.9MB. Max. memory is 16.1GB. [2022-11-26 00:18:45,157 INFO L158 Benchmark]: Witness Printer took 178.22ms. Allocated memory is still 432.0MB. Free memory was 186.0MB in the beginning and 172.4MB in the end (delta: 13.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-11-26 00:18:45,167 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22ms. Allocated memory is still 113.2MB. Free memory is still 63.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 238.39ms. Allocated memory is still 178.3MB. Free memory was 146.7MB in the beginning and 135.6MB in the end (delta: 11.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 39.69ms. Allocated memory is still 178.3MB. Free memory was 135.6MB in the beginning and 134.0MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 47.24ms. Allocated memory is still 178.3MB. Free memory was 134.0MB in the beginning and 132.7MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 413.65ms. Allocated memory is still 178.3MB. Free memory was 132.7MB in the beginning and 119.5MB in the end (delta: 13.3MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 74708.57ms. Allocated memory was 178.3MB in the beginning and 432.0MB in the end (delta: 253.8MB). Free memory was 118.8MB in the beginning and 186.0MB in the end (delta: -67.2MB). Peak memory consumption was 188.9MB. Max. memory is 16.1GB. * Witness Printer took 178.22ms. Allocated memory is still 432.0MB. Free memory was 186.0MB in the beginning and 172.4MB in the end (delta: 13.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 13]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L18] int counter = 0; [L20] long long a, b, p, q, r, s; [L21] int x, y; [L22] x = __VERIFIER_nondet_int() [L23] y = __VERIFIER_nondet_int() [L24] CALL assume_abort_if_not(x >= 1) VAL [\old(cond)=1, counter=0] [L8] COND FALSE !(!cond) [L24] RET assume_abort_if_not(x >= 1) VAL [counter=0, x=2159, y=1829] [L25] CALL assume_abort_if_not(y >= 1) VAL [\old(cond)=1, counter=0] [L8] COND FALSE !(!cond) [L25] RET assume_abort_if_not(y >= 1) VAL [counter=0, x=2159, y=1829] [L27] a = x [L28] b = y [L29] p = 1 [L30] q = 0 [L31] r = 0 [L32] s = 1 VAL [a=2159, b=1829, counter=0, p=1, q=0, r=0, s=1, x=2159, y=1829] [L34] EXPR counter++ VAL [a=2159, b=1829, counter=1, counter++=0, p=1, q=0, r=0, s=1, x=2159, y=1829] [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) VAL [\old(cond)=1, counter=1] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=1] [L35] RET __VERIFIER_assert(1 == p * s - r * q) VAL [a=2159, b=1829, counter=1, p=1, q=0, r=0, s=1, x=2159, y=1829] [L36] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, counter=1] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=1] [L36] RET __VERIFIER_assert(a == y * r + x * p) VAL [a=2159, b=1829, counter=1, p=1, q=0, r=0, s=1, x=2159, y=1829] [L37] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, counter=1] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=1] [L37] RET __VERIFIER_assert(b == x * q + y * s) VAL [a=2159, b=1829, counter=1, p=1, q=0, r=0, s=1, x=2159, y=1829] [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s VAL [a=330, b=1829, counter=1, p=1, q=0, r=-1, s=1, x=2159, y=1829] [L34] EXPR counter++ VAL [a=330, b=1829, counter=2, counter++=1, p=1, q=0, r=-1, s=1, x=2159, y=1829] [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) VAL [\old(cond)=1, counter=2] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=2] [L35] RET __VERIFIER_assert(1 == p * s - r * q) VAL [a=330, b=1829, counter=2, p=1, q=0, r=-1, s=1, x=2159, y=1829] [L36] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, counter=2] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=2] [L36] RET __VERIFIER_assert(a == y * r + x * p) VAL [a=330, b=1829, counter=2, p=1, q=0, r=-1, s=1, x=2159, y=1829] [L37] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, counter=2] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=2] [L37] RET __VERIFIER_assert(b == x * q + y * s) VAL [a=330, b=1829, counter=2, p=1, q=0, r=-1, s=1, x=2159, y=1829] [L39] COND FALSE !(!(a != b)) [L42] COND FALSE !(a > b) [L47] b = b - a [L48] q = q - p [L49] s = s - r VAL [a=330, b=1499, counter=2, p=1, q=-1, r=-1, s=2, x=2159, y=1829] [L34] EXPR counter++ VAL [a=330, b=1499, counter=3, counter++=2, p=1, q=-1, r=-1, s=2, x=2159, y=1829] [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) VAL [\old(cond)=1, counter=3] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=3] [L35] RET __VERIFIER_assert(1 == p * s - r * q) VAL [a=330, b=1499, counter=3, p=1, q=-1, r=-1, s=2, x=2159, y=1829] [L36] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, counter=3] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=3] [L36] RET __VERIFIER_assert(a == y * r + x * p) VAL [a=330, b=1499, counter=3, p=1, q=-1, r=-1, s=2, x=2159, y=1829] [L37] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, counter=3] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=3] [L37] RET __VERIFIER_assert(b == x * q + y * s) VAL [a=330, b=1499, counter=3, p=1, q=-1, r=-1, s=2, x=2159, y=1829] [L39] COND FALSE !(!(a != b)) [L42] COND FALSE !(a > b) [L47] b = b - a [L48] q = q - p [L49] s = s - r VAL [a=330, b=1169, counter=3, p=1, q=-2, r=-1, s=3, x=2159, y=1829] [L34] EXPR counter++ VAL [a=330, b=1169, counter=4, counter++=3, p=1, q=-2, r=-1, s=3, x=2159, y=1829] [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) VAL [\old(cond)=1, counter=4] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=4] [L35] RET __VERIFIER_assert(1 == p * s - r * q) VAL [a=330, b=1169, counter=4, p=1, q=-2, r=-1, s=3, x=2159, y=1829] [L36] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, counter=4] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=4] [L36] RET __VERIFIER_assert(a == y * r + x * p) VAL [a=330, b=1169, counter=4, p=1, q=-2, r=-1, s=3, x=2159, y=1829] [L37] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, counter=4] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=4] [L37] RET __VERIFIER_assert(b == x * q + y * s) VAL [a=330, b=1169, counter=4, p=1, q=-2, r=-1, s=3, x=2159, y=1829] [L39] COND FALSE !(!(a != b)) [L42] COND FALSE !(a > b) [L47] b = b - a [L48] q = q - p [L49] s = s - r VAL [a=330, b=839, counter=4, p=1, q=-3, r=-1, s=4, x=2159, y=1829] [L34] EXPR counter++ VAL [a=330, b=839, counter=5, counter++=4, p=1, q=-3, r=-1, s=4, x=2159, y=1829] [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) VAL [\old(cond)=1, counter=5] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=5] [L35] RET __VERIFIER_assert(1 == p * s - r * q) VAL [a=330, b=839, counter=5, p=1, q=-3, r=-1, s=4, x=2159, y=1829] [L36] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, counter=5] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=5] [L36] RET __VERIFIER_assert(a == y * r + x * p) VAL [a=330, b=839, counter=5, p=1, q=-3, r=-1, s=4, x=2159, y=1829] [L37] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, counter=5] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=5] [L37] RET __VERIFIER_assert(b == x * q + y * s) VAL [a=330, b=839, counter=5, p=1, q=-3, r=-1, s=4, x=2159, y=1829] [L39] COND FALSE !(!(a != b)) [L42] COND FALSE !(a > b) [L47] b = b - a [L48] q = q - p [L49] s = s - r VAL [a=330, b=509, counter=5, p=1, q=-4, r=-1, s=5, x=2159, y=1829] [L34] EXPR counter++ VAL [a=330, b=509, counter=6, counter++=5, p=1, q=-4, r=-1, s=5, x=2159, y=1829] [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) VAL [\old(cond)=1, counter=6] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=6] [L35] RET __VERIFIER_assert(1 == p * s - r * q) VAL [a=330, b=509, counter=6, p=1, q=-4, r=-1, s=5, x=2159, y=1829] [L36] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, counter=6] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=6] [L36] RET __VERIFIER_assert(a == y * r + x * p) VAL [a=330, b=509, counter=6, p=1, q=-4, r=-1, s=5, x=2159, y=1829] [L37] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, counter=6] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=6] [L37] RET __VERIFIER_assert(b == x * q + y * s) VAL [a=330, b=509, counter=6, p=1, q=-4, r=-1, s=5, x=2159, y=1829] [L39] COND FALSE !(!(a != b)) [L42] COND FALSE !(a > b) [L47] b = b - a [L48] q = q - p [L49] s = s - r VAL [a=330, b=179, counter=6, p=1, q=-5, r=-1, s=6, x=2159, y=1829] [L34] EXPR counter++ VAL [a=330, b=179, counter=7, counter++=6, p=1, q=-5, r=-1, s=6, x=2159, y=1829] [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) VAL [\old(cond)=1, counter=7] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=7] [L35] RET __VERIFIER_assert(1 == p * s - r * q) VAL [a=330, b=179, counter=7, p=1, q=-5, r=-1, s=6, x=2159, y=1829] [L36] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, counter=7] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=7] [L36] RET __VERIFIER_assert(a == y * r + x * p) VAL [a=330, b=179, counter=7, p=1, q=-5, r=-1, s=6, x=2159, y=1829] [L37] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, counter=7] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=7] [L37] RET __VERIFIER_assert(b == x * q + y * s) VAL [a=330, b=179, counter=7, p=1, q=-5, r=-1, s=6, x=2159, y=1829] [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s VAL [a=151, b=179, counter=7, p=6, q=-5, r=-7, s=6, x=2159, y=1829] [L34] EXPR counter++ VAL [a=151, b=179, counter=8, counter++=7, p=6, q=-5, r=-7, s=6, x=2159, y=1829] [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) VAL [\old(cond)=1, counter=8] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=8] [L35] RET __VERIFIER_assert(1 == p * s - r * q) VAL [a=151, b=179, counter=8, p=6, q=-5, r=-7, s=6, x=2159, y=1829] [L36] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, counter=8] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=8] [L36] RET __VERIFIER_assert(a == y * r + x * p) VAL [a=151, b=179, counter=8, p=6, q=-5, r=-7, s=6, x=2159, y=1829] [L37] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, counter=8] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=8] [L37] RET __VERIFIER_assert(b == x * q + y * s) VAL [a=151, b=179, counter=8, p=6, q=-5, r=-7, s=6, x=2159, y=1829] [L39] COND FALSE !(!(a != b)) [L42] COND FALSE !(a > b) [L47] b = b - a [L48] q = q - p [L49] s = s - r VAL [a=151, b=28, counter=8, p=6, q=-11, r=-7, s=13, x=2159, y=1829] [L34] EXPR counter++ VAL [a=151, b=28, counter=9, counter++=8, p=6, q=-11, r=-7, s=13, x=2159, y=1829] [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) VAL [\old(cond)=1, counter=9] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=9] [L35] RET __VERIFIER_assert(1 == p * s - r * q) VAL [a=151, b=28, counter=9, p=6, q=-11, r=-7, s=13, x=2159, y=1829] [L36] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, counter=9] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=9] [L36] RET __VERIFIER_assert(a == y * r + x * p) VAL [a=151, b=28, counter=9, p=6, q=-11, r=-7, s=13, x=2159, y=1829] [L37] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, counter=9] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=9] [L37] RET __VERIFIER_assert(b == x * q + y * s) VAL [a=151, b=28, counter=9, p=6, q=-11, r=-7, s=13, x=2159, y=1829] [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s VAL [a=123, b=28, counter=9, p=17, q=-11, r=-20, s=13, x=2159, y=1829] [L34] EXPR counter++ VAL [a=123, b=28, counter=10, counter++=9, p=17, q=-11, r=-20, s=13, x=2159, y=1829] [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) VAL [\old(cond)=1, counter=10] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=10] [L35] RET __VERIFIER_assert(1 == p * s - r * q) VAL [a=123, b=28, counter=10, p=17, q=-11, r=-20, s=13, x=2159, y=1829] [L36] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, counter=10] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=10] [L36] RET __VERIFIER_assert(a == y * r + x * p) VAL [a=123, b=28, counter=10, p=17, q=-11, r=-20, s=13, x=2159, y=1829] [L37] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, counter=10] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=10] [L37] RET __VERIFIER_assert(b == x * q + y * s) VAL [a=123, b=28, counter=10, p=17, q=-11, r=-20, s=13, x=2159, y=1829] [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s VAL [a=95, b=28, counter=10, p=28, q=-11, r=-33, s=13, x=2159, y=1829] [L34] EXPR counter++ VAL [a=95, b=28, counter=11, counter++=10, p=28, q=-11, r=-33, s=13, x=2159, y=1829] [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) VAL [\old(cond)=1, counter=11] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=11] [L35] RET __VERIFIER_assert(1 == p * s - r * q) VAL [a=95, b=28, counter=11, p=28, q=-11, r=-33, s=13, x=2159, y=1829] [L36] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, counter=11] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=11] [L36] RET __VERIFIER_assert(a == y * r + x * p) VAL [a=95, b=28, counter=11, p=28, q=-11, r=-33, s=13, x=2159, y=1829] [L37] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, counter=11] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=11] [L37] RET __VERIFIER_assert(b == x * q + y * s) VAL [a=95, b=28, counter=11, p=28, q=-11, r=-33, s=13, x=2159, y=1829] [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s VAL [a=67, b=28, counter=11, p=39, q=-11, r=-46, s=13, x=2159, y=1829] [L34] EXPR counter++ VAL [a=67, b=28, counter=12, counter++=11, p=39, q=-11, r=-46, s=13, x=2159, y=1829] [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) VAL [\old(cond)=1, counter=12] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=12] [L35] RET __VERIFIER_assert(1 == p * s - r * q) VAL [a=67, b=28, counter=12, p=39, q=-11, r=-46, s=13, x=2159, y=1829] [L36] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, counter=12] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=12] [L36] RET __VERIFIER_assert(a == y * r + x * p) VAL [a=67, b=28, counter=12, p=39, q=-11, r=-46, s=13, x=2159, y=1829] [L37] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, counter=12] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=12] [L37] RET __VERIFIER_assert(b == x * q + y * s) VAL [a=67, b=28, counter=12, p=39, q=-11, r=-46, s=13, x=2159, y=1829] [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s VAL [a=39, b=28, counter=12, p=50, q=-11, r=-59, s=13, x=2159, y=1829] [L34] EXPR counter++ VAL [a=39, b=28, counter=13, counter++=12, p=50, q=-11, r=-59, s=13, x=2159, y=1829] [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) VAL [\old(cond)=1, counter=13] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=13] [L35] RET __VERIFIER_assert(1 == p * s - r * q) VAL [a=39, b=28, counter=13, p=50, q=-11, r=-59, s=13, x=2159, y=1829] [L36] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, counter=13] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=13] [L36] RET __VERIFIER_assert(a == y * r + x * p) VAL [a=39, b=28, counter=13, p=50, q=-11, r=-59, s=13, x=2159, y=1829] [L37] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, counter=13] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=13] [L37] RET __VERIFIER_assert(b == x * q + y * s) VAL [a=39, b=28, counter=13, p=50, q=-11, r=-59, s=13, x=2159, y=1829] [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s VAL [a=11, b=28, counter=13, p=61, q=-11, r=-72, s=13, x=2159, y=1829] [L34] EXPR counter++ VAL [a=11, b=28, counter=14, counter++=13, p=61, q=-11, r=-72, s=13, x=2159, y=1829] [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) VAL [\old(cond)=1, counter=14] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=14] [L35] RET __VERIFIER_assert(1 == p * s - r * q) VAL [a=11, b=28, counter=14, p=61, q=-11, r=-72, s=13, x=2159, y=1829] [L36] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, counter=14] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=14] [L36] RET __VERIFIER_assert(a == y * r + x * p) VAL [a=11, b=28, counter=14, p=61, q=-11, r=-72, s=13, x=2159, y=1829] [L37] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, counter=14] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=14] [L37] RET __VERIFIER_assert(b == x * q + y * s) VAL [a=11, b=28, counter=14, p=61, q=-11, r=-72, s=13, x=2159, y=1829] [L39] COND FALSE !(!(a != b)) [L42] COND FALSE !(a > b) [L47] b = b - a [L48] q = q - p [L49] s = s - r VAL [a=11, b=17, counter=14, p=61, q=-72, r=-72, s=85, x=2159, y=1829] [L34] EXPR counter++ VAL [a=11, b=17, counter=15, counter++=14, p=61, q=-72, r=-72, s=85, x=2159, y=1829] [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) VAL [\old(cond)=1, counter=15] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=15] [L35] RET __VERIFIER_assert(1 == p * s - r * q) VAL [a=11, b=17, counter=15, p=61, q=-72, r=-72, s=85, x=2159, y=1829] [L36] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, counter=15] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=15] [L36] RET __VERIFIER_assert(a == y * r + x * p) VAL [a=11, b=17, counter=15, p=61, q=-72, r=-72, s=85, x=2159, y=1829] [L37] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, counter=15] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=15] [L37] RET __VERIFIER_assert(b == x * q + y * s) VAL [a=11, b=17, counter=15, p=61, q=-72, r=-72, s=85, x=2159, y=1829] [L39] COND FALSE !(!(a != b)) [L42] COND FALSE !(a > b) [L47] b = b - a [L48] q = q - p [L49] s = s - r VAL [a=11, b=6, counter=15, p=61, q=-133, r=-72, s=157, x=2159, y=1829] [L34] EXPR counter++ VAL [a=11, b=6, counter=16, counter++=15, p=61, q=-133, r=-72, s=157, x=2159, y=1829] [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) VAL [\old(cond)=1, counter=16] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=16] [L35] RET __VERIFIER_assert(1 == p * s - r * q) VAL [a=11, b=6, counter=16, p=61, q=-133, r=-72, s=157, x=2159, y=1829] [L36] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, counter=16] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=16] [L36] RET __VERIFIER_assert(a == y * r + x * p) VAL [a=11, b=6, counter=16, p=61, q=-133, r=-72, s=157, x=2159, y=1829] [L37] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, counter=16] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=16] [L37] RET __VERIFIER_assert(b == x * q + y * s) VAL [a=11, b=6, counter=16, p=61, q=-133, r=-72, s=157, x=2159, y=1829] [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s VAL [a=5, b=6, counter=16, p=194, q=-133, r=-229, s=157, x=2159, y=1829] [L34] EXPR counter++ VAL [a=5, b=6, counter=17, counter++=16, p=194, q=-133, r=-229, s=157, x=2159, y=1829] [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) VAL [\old(cond)=1, counter=17] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=17] [L35] RET __VERIFIER_assert(1 == p * s - r * q) VAL [a=5, b=6, counter=17, p=194, q=-133, r=-229, s=157, x=2159, y=1829] [L36] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, counter=17] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=17] [L36] RET __VERIFIER_assert(a == y * r + x * p) VAL [a=5, b=6, counter=17, p=194, q=-133, r=-229, s=157, x=2159, y=1829] [L37] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, counter=17] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=17] [L37] RET __VERIFIER_assert(b == x * q + y * s) VAL [a=5, b=6, counter=17, p=194, q=-133, r=-229, s=157, x=2159, y=1829] [L39] COND FALSE !(!(a != b)) [L42] COND FALSE !(a > b) [L47] b = b - a [L48] q = q - p [L49] s = s - r VAL [a=5, b=1, counter=17, p=194, q=-327, r=-229, s=386, x=2159, y=1829] [L34] EXPR counter++ VAL [a=5, b=1, counter=18, counter++=17, p=194, q=-327, r=-229, s=386, x=2159, y=1829] [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) VAL [\old(cond)=1, counter=18] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=18] [L35] RET __VERIFIER_assert(1 == p * s - r * q) VAL [a=5, b=1, counter=18, p=194, q=-327, r=-229, s=386, x=2159, y=1829] [L36] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, counter=18] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=18] [L36] RET __VERIFIER_assert(a == y * r + x * p) VAL [a=5, b=1, counter=18, p=194, q=-327, r=-229, s=386, x=2159, y=1829] [L37] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, counter=18] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=18] [L37] RET __VERIFIER_assert(b == x * q + y * s) VAL [a=5, b=1, counter=18, p=194, q=-327, r=-229, s=386, x=2159, y=1829] [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s VAL [a=4, b=1, counter=18, p=521, q=-327, r=-615, s=386, x=2159, y=1829] [L34] EXPR counter++ VAL [a=4, b=1, counter=19, counter++=18, p=521, q=-327, r=-615, s=386, x=2159, y=1829] [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) VAL [\old(cond)=1, counter=19] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=19] [L35] RET __VERIFIER_assert(1 == p * s - r * q) VAL [a=4, b=1, counter=19, p=521, q=-327, r=-615, s=386, x=2159, y=1829] [L36] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, counter=19] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=19] [L36] RET __VERIFIER_assert(a == y * r + x * p) VAL [a=4, b=1, counter=19, p=521, q=-327, r=-615, s=386, x=2159, y=1829] [L37] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, counter=19] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=19] [L37] RET __VERIFIER_assert(b == x * q + y * s) VAL [a=4, b=1, counter=19, p=521, q=-327, r=-615, s=386, x=2159, y=1829] [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s VAL [a=3, b=1, counter=19, p=848, q=-327, r=-1001, s=386, x=2159, y=1829] [L34] EXPR counter++ VAL [a=3, b=1, counter=20, counter++=19, p=848, q=-327, r=-1001, s=386, x=2159, y=1829] [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) VAL [\old(cond)=1, counter=20] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=20] [L35] RET __VERIFIER_assert(1 == p * s - r * q) VAL [a=3, b=1, counter=20, p=848, q=-327, r=-1001, s=386, x=2159, y=1829] [L36] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, counter=20] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=20] [L36] RET __VERIFIER_assert(a == y * r + x * p) VAL [a=3, b=1, counter=20, p=848, q=-327, r=-1001, s=386, x=2159, y=1829] [L37] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, counter=20] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=20] [L37] RET __VERIFIER_assert(b == x * q + y * s) VAL [a=3, b=1, counter=20, p=848, q=-327, r=-1001, s=386, x=2159, y=1829] [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s VAL [a=2, b=1, counter=20, p=1175, q=-327, r=-1387, s=386, x=2159, y=1829] [L34] EXPR counter++ VAL [a=2, b=1, counter=21, counter++=20, p=1175, q=-327, r=-1387, s=386, x=2159, y=1829] [L34] COND FALSE !(counter++<20) [L53] CALL __VERIFIER_assert(a - b == 0) VAL [\old(cond)=0, counter=21] [L11] COND TRUE !(cond) VAL [\old(cond)=0, cond=0, counter=21] [L13] reach_error() VAL [\old(cond)=0, cond=0, counter=21] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 24 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 74.5s, OverallIterations: 16, TraceHistogramMax: 61, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 10.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 348 SdHoareTripleChecker+Valid, 5.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 313 mSDsluCounter, 1716 SdHoareTripleChecker+Invalid, 4.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1241 mSDsCounter, 231 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2068 IncrementalHoareTripleChecker+Invalid, 2299 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 231 mSolverCounterUnsat, 475 mSDtfsCounter, 2068 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1883 GetRequests, 1536 SyntacticMatches, 28 SemanticMatches, 319 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3509 ImplicationChecksByTransitivity, 39.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=376occurred in iteration=15, InterpolantAutomatonStates: 179, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.5s AutomataMinimizationTime, 15 MinimizatonAttempts, 27 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 1.0s SatisfiabilityAnalysisTime, 8.6s InterpolantComputationTime, 1072 NumberOfCodeBlocks, 1049 NumberOfCodeBlocksAsserted, 24 NumberOfCheckSat, 1258 ConstructedInterpolants, 0 QuantifiedInterpolants, 6320 SizeOfPredicates, 69 NumberOfNonLiveVariables, 1798 ConjunctsInSsa, 276 ConjunctsInUnsatCore, 24 InterpolantComputations, 6 PerfectInterpolantSequences, 3284/5916 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: OVERALL_TIME: 1.2s, ICFG_INTERPRETER_ENTERED_PROCEDURES: 6, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 41, DAG_INTERPRETER_EARLY_EXITS: 2, TOOLS_POST_APPLICATIONS: 27, TOOLS_POST_TIME: 0.1s, TOOLS_POST_CALL_APPLICATIONS: 32, TOOLS_POST_CALL_TIME: 0.5s, TOOLS_POST_RETURN_APPLICATIONS: 20, TOOLS_POST_RETURN_TIME: 0.1s, TOOLS_QUANTIFIERELIM_APPLICATIONS: 79, TOOLS_QUANTIFIERELIM_TIME: 0.7s, TOOLS_QUANTIFIERELIM_MAX_TIME: 0.0s, FLUID_QUERY_TIME: 0.0s, FLUID_QUERIES: 106, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 38, DOMAIN_JOIN_TIME: 0.3s, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME: 0.0s, DOMAIN_WIDEN_APPLICATIONS: 0, DOMAIN_WIDEN_TIME: 0.0s, DOMAIN_ISSUBSETEQ_APPLICATIONS: 0, DOMAIN_ISSUBSETEQ_TIME: 0.0s, DOMAIN_ISBOTTOM_APPLICATIONS: 41, DOMAIN_ISBOTTOM_TIME: 0.1s, LOOP_SUMMARIZER_APPLICATIONS: 0, LOOP_SUMMARIZER_CACHE_MISSES: 0, LOOP_SUMMARIZER_OVERALL_TIME: 0.0s, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME: 0.0s, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 0, CALL_SUMMARIZER_APPLICATIONS: 20, CALL_SUMMARIZER_CACHE_MISSES: 4, CALL_SUMMARIZER_OVERALL_TIME: 0.0s, CALL_SUMMARIZER_NEW_COMPUTATION_TIME: 0.0s, PROCEDURE_GRAPH_BUILDER_TIME: 0.0s, PATH_EXPR_TIME: 0.0s, REGEX_TO_DAG_TIME: 0.0s, DAG_COMPRESSION_TIME: 0.0s, DAG_COMPRESSION_PROCESSED_NODES: 408, DAG_COMPRESSION_RETAINED_NODES: 114, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-11-26 00:18:45,212 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a548448c-8919-48b0-8612-a517d9507910/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE